Immergas Combustion or Mechanical Noise

Furnace is very noisy during operation, with humming, whistling, or droning sounds

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Fan imbalance or worn bearings, Incorrect gas pressure causing combustion noise, Loose panels or mounting, Resonance in flue system

How to Fix / Troubleshooting

Safety: Turn off power before tightening panels or accessing internal components. Gas adjustments must be done by a technician.

Steps:

  • 1. Check casing: Ensure all front and side panels are properly fitted and screws tightened. Loose panels can vibrate.
  • 2. Listen to source: Identify whether noise comes from the fan area, pump, or flue.
  • 3. Inspect flue supports: Make sure the flue is properly supported and not touching structures that can resonate.
  • 4. Technician tasks: Check fan bearings and replace the fan if noisy. Verify gas pressures and combustion settings to eliminate combustion roar or whistle.
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Repair Difficulty

Medium 3/5

Required Part

Flue Gas Fan Assembly
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